How to reskin game:
If you want to edit source code of the game, you will need to have a license of the program. But to reskin the game, you have to replace images in the “jump_boy_jump_html” folder(included in buyers pack).

Replace music and sound effects in media folder. In “config.txt” replace external links with yours. And, that’s it. You have your own reskin game.
In documentation, provided, you can see how to export project for android, but you can also export for ios windows, also for desktop(html5 game). Also, you can use ludei service(cocoon.io) for export project.
No programming knowledge needed for reskin game.